Home / 12,147.12-16,760.80-6,840.80

Finding the Fourth Proportional to 12,147.12, 16,760.80 and 6,840.80

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Solution

The fourth proportional to 12,147.12, 16,760.80 and 6,840.80 is: 9,439.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.12 : 16,760.80 = 6,840.80 : x
  2. Step 2: Convert to fraction form
    12,147.12/16,760.80 = 6,840.80/x
  3. Step 3: Cross multiply
    12,147.12x = 16,760.80 × 6,840.80
  4. Step 4: Simplify right side
    12,147.12x = 114,657,280.64
  5. Step 5: Solve for x
    x = 114,657,280.64/12,147.12
  6. Step 6: Final answer
    x = 9,439.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.